/*
 * Copyright 2002-2007 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.jdbc.core.metadata;

import java.sql.DatabaseMetaData;
import java.sql.SQLException;

/**
 * The Derby specific implementation of the {@link org.springframework.jdbc.core.metadata.TableMetaDataProvider}.
 * Overrides the Derby metadata info regarding retreiving generated keys. It seems to work OK so not sure why they
 * claim it's not supported.
 *
 * @author Thomas Risberg
 * @since 3.0
 */
public class DerbyTableMetaDataProvider extends GenericTableMetaDataProvider {

    private boolean supportsGeneratedKeysOverride = false;

    public DerbyTableMetaDataProvider(DatabaseMetaData databaseMetaData) throws SQLException {
        super(databaseMetaData);
    }

    @Override
    public void initializeWithMetaData(DatabaseMetaData databaseMetaData) throws SQLException {
        super.initializeWithMetaData(databaseMetaData);
        if (!databaseMetaData.supportsGetGeneratedKeys()) {
            logger.warn("Overriding supportsGetGeneratedKeys from DatabaseMetaData to 'true'; it was reported as " +
                    "'false' by " + databaseMetaData.getDriverName() + " " + databaseMetaData.getDriverVersion());
            supportsGeneratedKeysOverride = true;
        }
    }

    @Override
    public boolean isGetGeneratedKeysSupported() {
        boolean derbysAnswer = super.isGetGeneratedKeysSupported();
        if (!derbysAnswer) {
            return supportsGeneratedKeysOverride;
        }
        return derbysAnswer;
    }
}
